Well tape especially something not as adhesive such as electrical tape can be easily removed without defacing the computer, even half a post it note would work as intended.
If my kid got expelled from school for putting a post-it note over the spycam, I would not hesitate to use my savings to sue the *&$# out of the school district.
Business opportunity: ant-spycam stickers with Post-It Note (TM) type adhesive that have relevant for the environment graphics. I.e. I'm thinking of the before my time IBM "Think", something small enough to fit the form factor and that should be unobjectionable in a school setting.
Any zero tolerance policy for "stickers" ought to fail in the aftermath of this Charlie Foxtrot, especially as the nasty details come out or are blatantly suppressed.
